Question relating to the manipulation of matter on an atomic, molecular, and supramolecular scale.

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6 views

SERS Gold nanoparticles performing poorly in organic solvents?

We have been working with some organic solvents lately and noticed a sharp decrease in SERS performance from our gold nanoparticles deposited in an organic solvent such as methanol. With reference to ...
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12 views

superhydrofobicity and friction coefficient ?

I learned about superhydrofobic surface like instance water on glass which will not attach due to the lotus effect. Which is altering the surface energy and which will cause the surface to have a ...
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0answers
41 views

Investigating the displacement of a Se anion by a Sulphide anion

I am working with CdSe Quantum Dots suspended in hexane. I then tested the photoluminescence of my solution. Then I mixed my CdSe dots with a mixture of an organic conducting polymer which was ...
4
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0answers
23 views

Solubility of Silver Nanoparticles

(i) What happens when you put $\ce{Ag_{10}}$ and $\ce{Ag_5}$ clusters into an aqueous solution of pH = $13$ (ii) What happens when you put $\ce{Ag_{10}}$ and $\ce{Ag_5}$ clusters into an ...
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0answers
28 views

What are the strategies to deal with fluorescence from oil in Raman Spectroscopy?

I have a sample (for the purpose of this question let's call this Sample A) consisting of oil (edible olive oil) mixed with a contaminant (Contaminant B) from the Polycyclic Aromatic Hydrocarbons ...
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1answer
25 views

How do polymer properties change when moving from bulk to nanosized fibers?

Polymer are used in many applications, but how do the properties change when they are fabricated on the nanolevel? Im especially interested in polymeric and polymer derived nanofibers, and why they ...
2
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0answers
32 views

Difference between starch surfactant and CTAB, SDS, Tx-100

I am doing a research on the effect of surfactant on ZnO nanoparticles properties. There is a confusion here between starch surfactant and CTAB, Tx-100 and SDS. I need point on what is the difference ...
2
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0answers
21 views

Is there any porous material that can have narrow parallel and “perfectly straight” cavities/holes through it (or bored through it)?

I'm basically looking for a material that can allow photons to pass through its cavities, but only those photons that travel at an angle (almost) exactly perpendicular to the materials surface. ...
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3answers
162 views

Why is gold so popular in nanotechnology?

Gold is a very popular metal in nanotechnology. It is often used as a substrate in electronic applications, as a core of functionalized nanoparticles, and more. Why is gold so attractive? Why are ...
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1answer
20 views

Why does density increases when adding nanoparticles in a mixture of water and some clay?

I want to know that why density of drilling fluid which is a mixture of water, barrite, bentonite and carboxymethyl cellulose increases when i am adding silica nanoparticles. My ain of adding these ...
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0answers
20 views

How to embed silver nanoparticles in glass?

I am currently working on a project similar to http://phys.org/news/2014-01-team-inexpensive-transparent-screen-video.html and would like to know of the cheapest and safest method of doing so. I would ...
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1answer
119 views

What is the main difference between Quantum Clusters and Nanoclusters? [closed]

I know that Quantum Dots have high quantum yield and ranges from 2nm-10nm, and Nanoclusters have high fluorescence and ranges from 1nm-10nm. But the difference between them is that Quantum Dots ...
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1answer
87 views

Which mechanics or law is predominately seen on the nanoscale?

Nanotechnology and sciences are the study or the manipulation of matter on an atomic, molecular, and supramolecular scale especially at nano meter range. We know that at macro molecular level a system ...
4
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1answer
77 views

Palladium Nanocube

What is the relative permittivity and relative permeability of a palladium nanocube? If I change the size of this $\ce{Pd}$ nanocube, will these values be changed or remain the same?
3
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1answer
47 views

Solvent effect on gold nanoparticle and silver nanoparticle in UV spectroscopy?

Can anyone explain to me that how solvent factor affect the wavelength and intensity of gold nanoparticle and silver nanoparticle in UV spectroscopy?
3
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2answers
170 views

How do I setup the electrodes for cyclic voltammetry on a capacitor made on dry copper sheets?

I'm trying to measure capacitance of a cell I'm creating. It's composed of two copper-sheets with nano-material coated on one side, sandwiched with a membrane and wetted with $\ce{KOH}$. All of the ...
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0answers
27 views

What can I use instead of AOT in the following protocol?

We want to nanoencapsulate our pesticide using the following protocol; but we don’t have AOT surfactant. So, what can I use instead of AOT in the following protocol? Sodium alginate solution in ...
2
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1answer
105 views

What significance and applications does nanotechnology have in chemistry? [closed]

Specifically concerning organic chemistry, but an explanation on its significance and applications in inorganic chemistry would be great as well.
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1answer
87 views

Which sodium citrate is used in silver nanoparticles production?

In my studies, I have a group project to realise: to make some $\ce{Ag}$ nanoparticles using Turkevich method (boiling $\ce{AgNO3}$ with sodium citrate in water). In most of articles authors write ...
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1answer
170 views

How photoluminescence (PL) spectroscopy works

Photoluminescence (PL) spectroscopy is used to find the energy levels in a compound but how does PL spectroscopy works? After exciting a material with a particular wavelength whether PL machine looks ...
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1answer
893 views

Why carbon nanotubes can act as a good electrical conductor?

Bulk carbon is an insulator, but at nanoscale (e.g. carbon nanotubes) carbon may become a good electrical conductor. If I am correct this means carbon nanotube band structure is metal-like. E.g. it ...
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0answers
32 views

How to calculate “accurate” surface area of a microporous material using Micromeritics equipment?

How do I get an accurate surface area from a nitrogen isotherm? I've been doing some surface areas on MOFs and upon showing my boss the isotherms he asked me to convert them to show the "range", ...
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0answers
40 views

How to calculate concentration of hydrogel nanoparticles

I have prepared hydrogel nanoparticles in aqueous solution. How to calculate concentration of hydrogel nanoparticles ?
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1answer
183 views

Permanent Balloon?

Is it possible to create a container for helium that it can't permeate through, like a permanent balloon? Or, if not, what kind of material would have the lowest permeability for that application? I ...
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1answer
50 views

What kind of interacion is there between a nanoparticle and its functionalizing coating?

The functionalization of nanoparticles (with coatings such as polymer ligands; see image) are very common (for example, DNA-functionalizied gold nanoparticles). What's the type of interaction between ...
2
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0answers
37 views

Are there economical ways of synthesizing nanotubes?

I've heard Nanotubes will replace Li-ion batteries in the future and it is much more relevant. I just wanted to know could it really replace Li-ion batteries? Is synthesizing nanotubes economic?
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2answers
127 views

What is Nano Zinc Oxide?

First of all, I have zero chemical background, but I seek for an easy explanation about Nano Zinc Oxide. I was told that the name of "Nano Zinc Oxide" couldn't possibly exist. Instead, it should be ...
2
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1answer
64 views

extracting carbon nanotubes from graphite

I am searching for the carbon nano tubes for very low cost.I have one idea about the graphite which is in the tip of the pencil, can be converted as the carbon nano tubes.is it possible? if it is ...
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1answer
16 views

Does STED microscopy allow us to see reactions happening on a substrate

This years nobel prize for chemistry went to nanoscopy using STED as a control mechanism. I have seen the atoms/molecules of a lattice vibrating as shown by Stefan W Hell in a presentation at some ...
5
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2answers
386 views

Conversion of one atom to another to get the element of the latter atom in abundance

One child who is in 9th standard has claimed to have find a solution to all practical physical problems. On asking for details, he said that all periodic elements has common components, i.e. ...
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2answers
421 views

Intermolecular forces in Carbon Nanotubes?

What are the intermolecular forces that can be found in Carbon Nanotubes?
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1answer
44 views

Letting Copper sit in NaOH for 5 min (for monolayer assembly)

i made a self-assembled monolayer of dodecanethiol on copper, before that i let the copper in a solution of $\ce{NaOH}$ for 5 min, and i need to know what this step is for, anyone can help me?
3
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0answers
65 views

Synthesizing monodisperse PbS quantum dots

For a research project, I am trying to synthesize lead (II) sulfide quantum dots using the method of Li et al.. I am injecting sulfur dissolved in 1-octadecene into a mixture of $\ce{PbO}$, oleic ...
0
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1answer
86 views

Is there a good sol gel method for carbon nanotube thin film deposition?

I was searching for a sol gel method for deposition of carbon nanotube thin films and there aren't too many articles on that. Does anybody know the reason? Is it because Carbon nanotubes are ...
3
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0answers
63 views

TiO2 nanotube application in cement

I am perparing for a presentation on the application of TiO2 nanotubes in cement which is a recent topic in cement chemistry. Do you happen to have any papers (or know of any accessible on Internet) ...
3
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2answers
822 views

What's the difference between graphite, nanotubes, and fullerenes?

I understand that all of these are made up of carbon atoms but I don't understand what differentiates them. Since they are carbon they all must have covalent bonds, right?
2
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1answer
193 views

Producing Gold nano flakes

In terms of producing gold nano flakes, Guo et al. have mentioned in their journal, they added aniline to the solution of chloroauric acid in ethylene glycol at 95 degree Celsius. However, I couldn't ...
7
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1answer
291 views

What are simple applications of Monte Carlo simulations in chemistry, that can be done in Matlab?

I am trying to learn simulation myself and I have installed Matlab on my machine for that purpose. In web I have gone through some of the basics of Monte Carlo simulation, but I am unable to find a ...
4
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2answers
260 views

Gold nanoparticles in a water/oil environment

I am currently investigating the assembly of gold nanoparticles in a mixture of water and oil. The thing is the following: If we have gold nanoparticles (35nm diameter) dispersed in water and we put ...
7
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2answers
7k views

What is the difference between graphite oxide and graphene oxide?

I am considering making a sheet of graphene using the LightScribe technique and I have read that I need graphite oxide. However when I look up graphite oxide for sale, graphene oxide pops up. Are ...
3
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4answers
417 views

large wavelength range and list of x/y numerical data points of elements

I'm trying to get a set of FTIR or (FTIR like range) x/y numerical data points for a couple of elements, namely Silver, Platinum, Palladium, Gold and Sodium. I've looked on line and found images ...
3
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1answer
50 views

What is the mechanism of functionalisation of nanoparticle using long chain alcohols

How can long chain alcohols(not thiols) be functionalised on the surface of silver or gold nanoparticles? I have read in an article that Polyvinyl alcohol is used as a capping agent for silver ...
6
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2answers
535 views

Why do shape and size have the greatest effect on the optical properties of nanoparticles?

The LSPR properties of nanoparticles depend on a number of factors, including shape, size, material, crystal structure, dielectric environment, etc. However, it has been consistently shown that shape ...
3
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1answer
103 views

Simulation of a particle and chemical molecule

I am currently studying the basics of simulation and want to try out some experiments. It is a known fact that gold nanoparticles can bind to chemical groups which contains thiol (R–SH group). I want ...
5
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1answer
1k views

What is burst nucleation?

Can you tell me what is a burst nucleation process, and how can it be used for synthesising uniform nanoparticles? Can you also provide (if possible) any links to papers or materials regarding ...
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1answer
2k views

What is the bandgap value of SiO2?

Using Diffuse Reflectance Spectroscopy, I have obtained the band gap for $\small\ce{SiO2}$ (purchased from a chemical retailer) in the range of 3.25 to 4.75 eV. I would like to know if the values ...
3
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1answer
112 views

Can nanotechnology reduce electrode losses in electrochemical cells?

I'm just curious about this topic, as most portable, "clean" energy sources or carriers (in the sense of not being a primary energy source -fuel cell hydrogen, for example) are in essence ...
7
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1answer
171 views

What does the charge distribution around a Stone-Wales defect look like?

I'm reading a book on carbon nanotubes (P.J.F. Harris, Carbon Nanotube Science, to be specific) at the moment and puzzling about Stone-Wales or 5775 defects. This is where two adjacent carbons undergo ...